Creatinine is a waste product that’s made when creatine, an amino acid produced by the liver and present in certain foods, is broken down by your muscles to serve as an energy source during physical ...

A BUN test measures the level of urea nitrogen in the blood using a standard blood sample. Abnormal BUN levels may indicate problems with liver or kidney functioning. BUN stands for blood urea ...

In response to my recent column on creatine, a reader inquired about the difference between creatine versus creatinine. Are they related, and if so, how? Good question, and a topic that often surfaces ...

Dear Dr. Roach: I am a female, nearly 55 years old. In August 2011, I was fortunate to receive a heart transplant (I had an enlarged, weakened heart that was thought to have started with a virus).